It's been open since 1951...
...and just now they are offended?
I think this just proves this 'political correct' jargon concerning the Sioux and other Indians (and yes, I use that word deliberately) is all a bunch of hogwash.
I live in Virginia. The politically correct term here, according to the tribes themselves is "American Indian."
Thye finally figured out that Crazy Horse was braver than any 10 Frenchmen.
I'd be PO'd too if the French were using the name of one of the people I based my Heritage on